    private static void change(String uri) {

        File f = new File(uri);
        if (f.isFile()) return;
        File[] files = f.listFiles();
        for (int i = 0; i < files.length; i++) {
            if (files[i].getName()=="markdown-overview.md") continue;
            String full = files[i].getName();
            char[] chars=full.toCharArray();
            int datelen=chars.length;
            String newName=full.substring(11,datelen);
//            String date=full.substring(9,);
            print(newName);

            boolean b=files[i].renameTo(new File("/home/lechance/test/"+newName));
            String later=files[i].getName();
            print(b);
        }
    }
